B. LydeJcTier — On Fossil Mammalia. 



67 



the species in the type genus ; but if the genus Flesiomeryx be 

 maintained, it would seem necessary to form another genus for the 

 present form, as the position of the diastema is different from 

 that which occurs in the species of Flesiomeryx of which the skull 

 is known, or in Monillactherium. 



The following table gives the dimensions of the skulls of C. Filholi 

 and a typical skull of C. laticurvatum. 



C. Filholi. 



No. 



No 



M 



' 1400 



0-073 



0-064 



0-031 



0-0143 



0-0175 

 0-0075 



0-013 

 0-003 



C. laticuT' 

 vatiim. 



.. 0-0815 



.. 0-070 



. . 0-037 



.. 0-0175 



. . 0-015 



. . 0-024 



.. 0-006 



.. 0-016 



.. 0-033 



.. 0-015 



.. 0-067 



.. 0-043 



.. 0-042 



.. 0-034 



.. 005 



.. 0-017 



Cranium. — Exti-eme length superiorly 0-081 



,, inferiorly 0-067 



Lengtli of series of cheek-teeth .... 0-032 



,, true molars 0-0144 



Width of palate at m. 3 0-014 



Length of nasals 0-019 



Greatest width of do 0-008 



Height of occiput 0-015 



Extreme height of cranium 0-033 



Vertical diameter of orbit 0-014 



Length of diastema 0-0037 



Mandible. — Extreme length 0-056 



,, height 0-037 



Length of dental series 0-039 



last six teeth 0-030 



Height at p.m. 2 0-007 



m. 3 0-013 



Length of diastema 0-0026 



CiENOTHERIUM Sp. (? nOV.) 

 From the Quercy Fhosphorites. 

 The anterior portion of a third cranium from Caylux, which is 

 figured from the palatal aspect in woodcut Fig. 3, apparently indicates 

 a new variety or species. With the excep- 

 tion of the third incisor, the specimen shows 

 the complete dentition on the left side ; 

 and also the orbit and the anterior root 

 of the left zygomatic arch. The premaxilla 

 and frontal of the same side also remain ; 

 but the nasals have disappeared, although 

 a cast of their inner surface remains. The 

 dentition is of the type of the last species ; 

 that is, there is a diastema between the 

 canine and pm- 1 ; and in no other part. 

 This character at once distinguishes the 

 specimen from the first four species of 



Cienotherium mentioned in the list given 

 above : and the specimen is of considerably 

 larger size than either of the last three 



species in that list. From C. Filholi it is 



distinguished by the much smaller space 



Fig. 3. Ccenotherium, sp. 

 The palatal portion of tbe 

 cranium : from the Upper 

 Eocene of Caylux. i-. (No. 

 M. 1401.) 



occupied by the cheek-teeth ; and also by 



the circumstance that the nasals (as shown 



by their cast) are of the elongated type of C. commune ; terminating 



anteriorly in a notch, and with their lateral borders diverging 



